package com.example.lotterysystem.service.impl;

import com.example.lotterysystem.common.errorcode.ServiceErrorCodeConstants;
import com.example.lotterysystem.common.exception.ServiceException;
import com.example.lotterysystem.common.utils.JacksonUtil;
import com.example.lotterysystem.common.utils.RedisUtil;
import com.example.lotterysystem.controller.param.DrawPrizeParam;
import com.example.lotterysystem.controller.param.ShowWinningRecordsParam;
import com.example.lotterysystem.dao.dataobject.*;
import com.example.lotterysystem.dao.mapper.*;
import com.example.lotterysystem.service.DrawPrizeService;
import com.example.lotterysystem.service.dto.WinningRecordDTO;
import com.example.lotterysystem.service.enums.ActivityPrizeStatusEnum;
import com.example.lotterysystem.service.enums.ActivityPrizeTiersEnum;
import com.example.lotterysystem.service.enums.ActivityStatusEnum;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;

import java.util.*;
import java.util.stream.Collectors;

import static com.example.lotterysystem.common.config.DirectRabbitConfig.EXCHANGE_NAME;
import static com.example.lotterysystem.common.config.DirectRabbitConfig.ROUTING;

@Service
public class DrawPrizeServiceImpl implements DrawPrizeService {




    private static final Logger logger = LoggerFactory.getLogger(DrawPrizeServiceImpl.class);
    private final String WINNING_RECORDS_PREFIX = "WINNING_RECORDS_";
    private final Long WINNING_RECORDS_TIMEOUT = 60 * 60 * 24 * 2L;
    @Autowired
    private RabbitTemplate rabbitTemplate;
    @Autowired
    private ActivityMapper activityMapper;
    @Autowired
    private ActivityPrizeMapper activityPrizeMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private PrizeMapper prizeMapper;
    @Autowired
    private WinningRecordMapper winningRecordMapper;
    @Autowired
    private RedisUtil redisUtil;

    @Override
    public void drawPrize(DrawPrizeParam param) {

        Map<String,String> map = new HashMap<>();
        map.put("messageId",String.valueOf(UUID.randomUUID()));
        map.put("messageData", JacksonUtil.writeValueAsString(param));
        //发消息
        rabbitTemplate.convertAndSend(EXCHANGE_NAME,ROUTING,map);
        logger.info("mq消息发送成功 map{}", JacksonUtil.writeValueAsString(map));

        //
    }

    @Override
    public Boolean checkDrawPrizeParam(DrawPrizeParam param) {

        ActivityDO activityDO = activityMapper.selectById(param.getActivityId());
        //奖品是否存在可以从 activity_Prize
        ActivityPrizeDO activityPrizeDO = activityPrizeMapper.selectByAPId(param.getActivityId(),param.getPrizeId());

        //活动是否存在
        if(null == activityDO || null == activityPrizeDO){
            //throw new ServiceException(ServiceErrorCodeConstants.ACTIVITY_OR_PRIZE_IS_EMPTY);
            logger.info("校验抽奖请求失败!失败原因{}",ServiceErrorCodeConstants.ACTIVITY_OR_PRIZE_IS_EMPTY.getMsg());
            return false;
        }
        //活动是否有效
        if (activityDO.getStatus().equalsIgnoreCase(ActivityStatusEnum.COMPLETED.name())){
           // throw new ServiceException(ServiceErrorCodeConstants.ACTIVITY_COMPLETED);
            logger.info("校验抽奖请求失败!失败原因{}",ServiceErrorCodeConstants.ACTIVITY_COMPLETED.getMsg());
            return false;
        }
        //奖品是否有效
        if (activityPrizeDO.getStatus().equalsIgnoreCase(ActivityPrizeStatusEnum.COMPLETED.name())){
           // throw new ServiceException(ServiceErrorCodeConstants.ACTIVITY_PRIZE_COMPLETED);
            logger.info("校验抽奖请求失败!失败原因{}",ServiceErrorCodeConstants.ACTIVITY_PRIZE_COMPLETED.getMsg());

            return false;
        }
        //中奖者人数是否和设置奖品数量一致
        if(activityPrizeDO.getPrizeAmount() != param.getWinnerList().size()){
           // throw new ServiceException(ServiceErrorCodeConstants.ACTIVITY_PRIZE_AMOUNT_ERROR);
            logger.info("校验抽奖请求失败!失败原因{}",ServiceErrorCodeConstants.ACTIVITY_PRIZE_AMOUNT_ERROR.getMsg());

            return false;
        }


        return true;

    }

    @Override
    public List<WinningRecordDO> saveWinnerRecords(DrawPrizeParam param) {
        //查询相关信息  活动 人员 奖品 活动关联奖品表
        ActivityDO activityDO = activityMapper.selectById(param.getActivityId());
        List<UserDO> userDOList = userMapper.batchSelectByIds(
                param.getWinnerList()
                        .stream().map(DrawPrizeParam.Winner::getUserId)
                .collect(Collectors.toList())
        );
        PrizeDO prizeDO =prizeMapper.selectById(param.getPrizeId());
        ActivityPrizeDO activityPrizeDO =
                activityPrizeMapper.selectByAPId(param.getActivityId(),param.getPrizeId());
        //构造中奖者记录 保存
        List<WinningRecordDO> winnerRecordDOList = userDOList.stream()
                .map(userDO -> {
                    WinningRecordDO winnerRecordDO = new WinningRecordDO();
                    winnerRecordDO.setActivityId(activityDO.getId());
                    winnerRecordDO.setActivityName(activityDO.getActivityName());
                    winnerRecordDO.setPrizeId(prizeDO.getId());
                    winnerRecordDO.setPrizeName(prizeDO.getName());
                    winnerRecordDO.setPrizeTier(activityPrizeDO.getPrizeTiers());
                    winnerRecordDO.setWinnerId(userDO.getId());
                    winnerRecordDO.setWinnerName(userDO.getUserName());
                    winnerRecordDO.setWinnerEmail(userDO.getEmail());
                    winnerRecordDO.setWinnerPhoneNumber(userDO.getPhoneNumber());
                    winnerRecordDO.setWinningTime(param.getWinningTime());
                    return winnerRecordDO;
                }).collect(Collectors.toList());

        winningRecordMapper.batchInsert(winnerRecordDOList);
        //缓存中奖者
        //缓存奖品维度中奖记录
        cacheWinningRecords(param.getActivityId()+"_"+param.getPrizeId(),winnerRecordDOList,WINNING_RECORDS_TIMEOUT);

        //缓存活动维度中奖记录
        if(activityDO.getStatus().equalsIgnoreCase(ActivityStatusEnum.COMPLETED.name())){

            List<WinningRecordDO> allList = winningRecordMapper.selectByActivityId(param.getActivityId());


            cacheWinningRecords(String.valueOf(param.getActivityId()),allList,WINNING_RECORDS_TIMEOUT);

        }
    return winnerRecordDOList;
    }

    @Override
    public void deleteRecords(Long activityId, Long prizeId) {
        if(null == activityId){
            logger.warn("要删除中奖记录的相关活动的活动id");
            return;
        }
        //删除数据表
        winningRecordMapper.deleteRecords(activityId,prizeId);
        //删除缓存
        if(null != prizeId){
            deleteWinningRecords(activityId+"_"+prizeId);
        }

        deleteWinningRecords(String.valueOf(activityId));
    }

    @Override
    public List<WinningRecordDTO> getRecords(ShowWinningRecordsParam param) {
        //查询redis:奖品,活动
        String key = null == param.getPrizeId()
                ? String.valueOf(param.getActivityId())
                : param.getActivityId()+"_"+param.getPrizeId();
        List<WinningRecordDO> winningRecordDOList = getWinningRecords(key);
        if (!CollectionUtils.isEmpty(winningRecordDOList)) {
            return convertToWinningRecordDTOList(winningRecordDOList);
        }
        //如果redis不存在,查库
        winningRecordDOList = winningRecordMapper.selectByActivityIdOrPrizeId(param.getActivityId(),param.getPrizeId());
        //存放到redis
        if(CollectionUtils.isEmpty(winningRecordDOList)){
            logger.info("查询的中奖记录为空!param{}",JacksonUtil.writeValueAsString(param));
            return Arrays.asList();
        }
        cacheWinningRecords(key,winningRecordDOList,WINNING_RECORDS_TIMEOUT);
        return convertToWinningRecordDTOList(winningRecordDOList);
    }

    private List<WinningRecordDTO> convertToWinningRecordDTOList(
            List<WinningRecordDO> winningRecordDOList) {
        if (CollectionUtils.isEmpty(winningRecordDOList)) {
            return Arrays.asList();
        }
        return winningRecordDOList.stream().map(winningRecordDO -> {
            WinningRecordDTO winningRecordDTO = new WinningRecordDTO();
            winningRecordDTO.setWinnerId(winningRecordDO.getWinnerId());
            winningRecordDTO.setWinnerName(winningRecordDO.getWinnerName());
            winningRecordDTO.setPrizeName(winningRecordDO.getPrizeName());
            winningRecordDTO.setPrizeTier(ActivityPrizeTiersEnum.forName(winningRecordDO.getPrizeTier()));
            winningRecordDTO.setWinningTime(winningRecordDO.getWinningTime());
            return winningRecordDTO;
        }).collect(Collectors.toList());
    }

    private void deleteWinningRecords(String key) {
            try {
                if (redisUtil.hasKey(WINNING_RECORDS_PREFIX+key)){
                    //存在再删除
                    redisUtil.del(WINNING_RECORDS_PREFIX+key);
                }
            }catch (Exception e){
                logger.error("删除中奖记录缓存异常:key:{}",key);
            }
    }

    private void cacheWinningRecords(String key,
                                     List<WinningRecordDO> winnerRecordDOList,
                                     Long time) {
        String str = "";

        try {
            if (!StringUtils.hasText(key)
                    || CollectionUtils.isEmpty(winnerRecordDOList) ) {
                logger.warn("要缓存的内容为空!key:{},value:{}",key,winnerRecordDOList);
                return;
            }
            str = JacksonUtil.writeValueAsString(winnerRecordDOList);
            redisUtil.set(WINNING_RECORDS_PREFIX+key,
                    str,
                    time);
        }catch (Exception e){
            logger.error("缓存中奖记录异常 : key :{},value :{}", WINNING_RECORDS_PREFIX+key, str);
        }
    }





    private List<WinningRecordDO> getWinningRecords(String key) {
        try {
            if (!StringUtils.hasText(key)) {
                logger.warn("要从缓存中查询中奖记录的key为空！");
                return Arrays.asList();
            }
            String str = redisUtil.get(WINNING_RECORDS_PREFIX + key);
            if (!StringUtils.hasText(str)) {
                return Arrays.asList();
            }

            return JacksonUtil.readListValue(str, WinningRecordDO.class);
        } catch (Exception e) {
            logger.error("从缓存中查询中奖记录异常！key:{}", WINNING_RECORDS_PREFIX + key);
            return Arrays.asList();
        }
    }




}
